This process of dephasing and reduction in the amount of transverse magnetization is called transverse relaxation. A characteristic time representing the decay of the signal by 1/ e, or 37%, is called the T2 relaxation time (1).2 * is shorter than T2 (Fig 1), and their relationship can be expressed by the following equation (3), where Î³ is the gyromagnetic ratio: 1/T2 * = 1/T2 + Î³ Î´B inhom, or 1/T2 * = 1/T2 + 1/T2â², where 1/T2â² = Î³ Î´B inhom, and Î´B inhom is the magnetic field inhomogeneity across a voxel.
An average central ac will use 3000 to 5000 watts of power every hour for around 9 hours a day during the hotter months. Click calculate to find the energy consumption of a central air conditioner using 3500 Watts for 3 hours a day @ $0.10 per kWh. Running 3 hours a day is the same as running 9 hours a day for 4 of the warmer months. Cost Per Hour:
A typical electric heater rated at 1,500 watts could heat a room measuring 150 square feet. To calculate the cost to operate an electric heater, multiply the wattage of the unit by the number of hours you use it each day, then divide by 1,000 to find kilowatt hours per day. A 1,500 watt heater used for 12 hours each day uses 18 kWh daily.